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生态补偿 4

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合成孔径雷达(SAR);顺轨干涉;运动补偿;残余误差;干涉相位 1

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Performance analysis of series/parallel and dual side LCC compensation topologies of inductive power

P. Srinivasa Rao NAYAK, Dharavath KISHAN

《能源前沿(英文)》 2020年 第14卷 第1期   页码 166-179 doi: 10.1007/s11708-018-0549-z

摘要: In an inductive battery charging system, for better power transfer capability and attaining required power level, compensation is necessary. This paper analyzes series/parallel (S/P) and dual side inductor-capacitor-capacitor (LCC) compensation topologies for inductive power transfer of electric vehicle (EV) battery charging system. The design and modeling steps of inductive power transfer for electric vehicle battery charging system are presented. Besides, the equivalent electrical circuits are used to describe the circuit compensation topologies. The results convey that the efficiency of dual side LCC compensation is higher than that of S/P compensation at variable mutual inductance (misalignment).

关键词: series/parallel compensation     electric vehicle (EV)     dual side LCC compensation     inductive power transfer    

Research on the ecological compensation standard of the basin pollution control project based on evolutionary

Dongbin HU, Huiwu LIU, Xiaohong CHEN, Yang CHEN

《工程管理前沿(英文)》 2019年 第6卷 第4期   页码 575-583 doi: 10.1007/s42524-019-0044-1

摘要: Ecological compensation is a new resource and environment management model. As one of the main areas for implementing ecological compensation policies, basin ecological compensation has become an important measure for encouraging basin pollution control projects and improving the quality of regional economic development. By applying the basic game analysis of evolutionary game theory and building an evolutionary game model with a “reward–punishment” mechanism, this paper compares the interest-related decision-making behaviors of the upstream and downstream stakeholders of basin ecological compensation. By using data on the water quality of Xiangjiang River Basin, this paper calculates the rewards and penalties in different intervals by building a parametric regression mathematical model and employing the local linear regression method. Results show that a decline in water quality should be fined RMB 925500 yuan, an improvement in water quality should be awarded RMB 1227800 yuan, and a deteriorating water quality should be severely fined RMB 5087600 yuan.

关键词: evolutionary game     ecological compensation standard     Xiangjiang River Basin    

筑坝河流的生态补偿

董哲仁

《中国工程科学》 2006年 第8卷 第1期   页码 5-10

摘要:

从河流的连续性特征出发分析了大坝对于河流生态系统的胁迫问题。指出要在自然-社会-经济复合生态系统中全面权衡筑坝的利弊得失。讨论了对于筑坝河流进行生态补偿的可行性,建议开展河流生态系统功能价值评估,建立生态补偿的合理机制。

关键词: 大坝     河流     生态补偿     生态恢复     补偿机制    

Social responsibility in infrastructure mega-projects: A case study of ecological compensation for

Zheming LIU, Liangyan WANG, Zhaohan SHENG, Xinglin GAO

《工程管理前沿(英文)》 2018年 第5卷 第1期   页码 98-108 doi: 10.15302/J-FEM-2018084

摘要: Ecological compensation plays an important role in implementing the social responsibility of infrastructure mega-projects. Based on the results of a field study, an in-depth interview, and archive data, this paper introduces the ecological compensation for (the Indo-Pacific humpbacked dolphin) during the construction of the Hong Kong-Zhuhai-Macao Bridge. It studies the concrete measures, decision-making processes, and organizational collaboration of the ecological compensation, using the method of a case study. The present study not only enriches our understanding of the ecological compensation practice during the construction of infrastructure mega-projects, but also extends the literature on the social responsibility of infrastructure mega-projects. This sheds light on the protection of the environment as well as biodiversity in the construction of future infrastructure mega-projects.

关键词: infrastructure mega-projects     social responsibility     ecological compensation     Hong Kong-Zhuhai-Macao Bridge     Sousa chinensis    

Quantitative standard of eco-compensation for the water source area in the middle route of the South-to-North

Zhanfeng DONG, Jinnan WANG

《环境科学与工程前沿(英文)》 2011年 第5卷 第3期   页码 459-473 doi: 10.1007/s11783-010-0288-9

摘要: The Middle Route Project(MRP) of the South-to-North Water Transfer Scheme (SNWT) in China will require a very large financial expenditure to ensure the water supply and the associated water quality to northern China. An eco-compensation mechanism between the water service source areas and its beneficiaries is essential. This paper establishes an analytic framework of eco-compensation standard for the protection of the water source area, including both the calculation of eco-compensation based on opportunity cost method (OCM) and calculation of the burden sharing of eco-compensation between the water source area and the external water reception area based on the deviation square method (DSM). Taking Shiyan City, Hubei Province in China as a case study, our results show that the eco-compensation in the first-phase of MRP for the water source area in Shiyan, Hubei Province should be 1.63×10 CNY, about four times of planned eco-construction investment budget(4.33×10 CNY). In addition, the burden sharing of eco-compensation varied greatly in terms of different methods. It would be better to integrate the results of different single-factor burden sharing methods by determining the corresponding weighting coefficient with DSM and form one unanimous consent result by the interested parties.

关键词: the South-to-North Water Transfer Scheme     eco-compensation standard     opportunity costs     deviation square method    

Determination of the scheme of precision grinding compensation on the radome

GUO Dongming, LIU Minjing, ZHANG Chunbo, SHENG Xianjun, SUN Yuwen

《机械工程前沿(英文)》 2007年 第2卷 第3期   页码 263-266 doi: 10.1007/s11465-007-0045-3

摘要: The radome, which is often used to house airborne scanning radar antennas, causes a large boresight error and boresight error slope of the radar antenna. One way to decrease the boresight error induced by the radome is to modify its geometric thickness. Determining the grinding scheme from the boresight error performance is the most important problem to be solved. A typical inverse problem about electromagnetic fields is solving the precise grinding compensation area and allowance according to the antenna aperture distribution and the radome s boresight error performance, which could hardly be solved by a purely mathematical method. An effective approach combining theoretical analysis and mathematical calculations with experimental measurement is presented in this paper to determine the grinding area and allowance for compensating the boresight error performance of the radome. By comparing the calculated and measured data of the boresight error and the boresight error slope before and after grinding, it is shown that this method is simple and practical and can be used for many kinds of radomes.

关键词: mathematical     effective approach     experimental measurement     antenna     electromagnetic    

Ecological compensation based on willingness to accept for conservation of drinking water sources

Linyu XU,Bing YU,Yang LI

《环境科学与工程前沿(英文)》 2015年 第9卷 第1期   页码 58-65 doi: 10.1007/s11783-014-0688-3

摘要: Ecological compensation is a powerful environmental economic tool for environmental protection in areas where drinking water sources are located. We established an ecological compensation accounting system based on respondents’ willingness to accept (WTA). In this system, stakeholder preferences and the factors that influence them can be gauged effectively using logit and tobit models. We applied this accounting system to ecological compensation for the Miyun Reservoir, Beijing, China. The average WTA value for Miyun Reservoir residents was approximately 1186 CNY per family in 2012, which could be set as a suitable compensation standard, since it is slightly higher than the local protection cost. Thus, the annual total ecological compensation could be 58.73 million CNY. Distance from the reservoir, job types, and attitude to environmental protection were variables with significant effects on WTA. In addition, trends for individual preferences were identified via an analysis of key influential factors. The results suggest some useful information for establishing ecological compensation mechanisms for conservation of drinking water sources. Suggestions include popularizing the concept and meaning of ecological compensation among residents, setting different compensation levels based on distance from the reservoir, considering the requirements of farmers, and taking various in-kind and out-of-kind compensation approaches.

关键词: contingent valuation method     questionnaire survey     Miyun Reservoir    

A combined modulated feedback and temperature compensation approach to improve bias drift of a closed-loop

Ming-jun MA,Zhong-he JIN,Hui-jie ZHU

《信息与电子工程前沿(英文)》 2015年 第16卷 第6期   页码 497-510 doi: 10.1631/FITEE.1400349

摘要: The bias drift of a micro-electro-mechanical systems (MEMS) accelerometer suffers from the 1/ noise and the temperature effect. For massive applications, the bias drift urgently needs to be improved. Conventional methods often cannot address the 1/ noise and temperature effect in one architecture. In this paper, a combined approach on closed-loop architecture modification is proposed to minimize the bias drift. The modulated feedback approach is used to isolate the 1/ noise that exists in the conventional direct feedback approach. Then a common mode signal is created and added into the closed loop on the basis of modulated feedback architecture, to compensate for the temperature drift. With the combined approach, the bias instability is improved to less than 13 μ , and the drift of the Allan variance result is reduced to 17 μ at 100 s of the integration time. The temperature coefficient is reduced from 4.68 to 0.1 m /°C. The combined approach could be useful for many other closed-loop accelerometers.

关键词: Bias drift     Closed-loop MEMS accelerometer     Modulated feedback approach     Temperature compensation    

A pre-compensation method of the systematic contouring error for repetitive command paths

D. L. ZHANG,Y. H. CHEN,Y. P. CHEN

《机械工程前沿(英文)》 2015年 第10卷 第4期   页码 367-372 doi: 10.1007/s11465-015-0367-5

摘要:

For a repetitive command path, pre-compensating the contouring error by modifying the command path is practical. To obtain the pre-compensation value with better accuracy, this paper proposes the use of a back propagation neural network to extract the function of systematic contouring errors. Furthermore, by using the extracted function, the contouring error can be easily pre-compensated. The experiment results verify that the proposed compensation method can effectively reduce contouring errors.

关键词: contouring error     pre-compensation     motion control system     back propagation (BP) neural network    

Ecological compensation mechanism for urban green land and its application in Shanghai, China

WANG Yan, DING Xiaowen, QIAN Longxia, WANG Hongrui

《环境科学与工程前沿(英文)》 2007年 第1卷 第3期   页码 320-324 doi: 10.1007/s11783-007-0054-9

摘要: Urban green land compensation plays an important role in county development, ecological environment management and many other fields. The concept, methods and principles of urban green land are introduced in this paper. According to the pay fee method, the value and ecological function of various types of urban green land were analyzed. The cost-benefit analysis method (CBAM) was used to estimate different external diseconomy benefits caused by green land loss. The authors applied CBAM to estimate such benefits in the case of Shanghai, China, and calculated the actual compensation value for green land. Results indicated that in 2002, the compensation value for the green land of Shanghai was RMB 8.58 × 10 Yuan/hm.

关键词: development     Yuan/hm     different external     concept     cost-benefit analysis    

三峡库区及其上游水污染防治补偿机制的探讨

何继善,戴若林,王孟钧,张彦春

《中国工程科学》 2008年 第10卷 第5期   页码 6-9

摘要:

基于生态环境补偿的理念,提出了建立水污染防治补偿机制的必要性和理论依据,探讨了水污染防治补偿机制建立的基本原则、补偿主体和补偿模式等相关问题,并结合三峡库区及其上游地区的具体情况,提出了建立国家层面的水污染防治补偿机制的具体建议。缓解三峡库区及其上游地区水污染治理资金短缺的矛盾,调动上下游合力治污的积极性,对流域水质保护和水污染防治具有重要的现实意义。

关键词: 水污染防治补偿机制     外部性     卡尔多–希克斯改进原理     国家补偿    

毫米波调频步进雷达运动补偿方法研究

王桂丽,李兴国

《中国工程科学》 2008年 第10卷 第7期   页码 184-187

摘要:

 毫米波调频步进(chirp-step frequency , Chirp-SF)雷达是一种距离高分辨率雷达,但是存在严重的距离 速度耦合问题,所以实现运动目标的距离高分辨必须进行运动补偿。文章提出了一种把脉冲多普勒(Pulse Doppler)测速和基于Chirp-SF信号的时域相关法测速相复合的方法。仿真结果表明该方法测速精度高,算法简单,速度快。

关键词: 毫米波雷达     调频步进     多普勒     运动补偿    

Error compensation for tool-tip trace during cutting of laminated paper for rapid prototyping

Yucheng DING, Changhe LI, Dichen LI, Guoxin YU

《机械工程前沿(英文)》 2009年 第4卷 第2期   页码 111-119 doi: 10.1007/s11465-009-0020-2

摘要: Laminated object manufacturing (LOM) is one of the commercialized rapid prototyping (RP) processes, where a focused laser is usually used to cut the cross-section contours of a 3 D part and the grid hatchings of the part-exterior region on a sheet paper stack-wise. Using a laser beam as a cutter can be costly, and the thermal burning of a sheet paper along a laser scanning path can also cause an environment-polluting smoke. This paper presents a paper laminating RP system using a knife as the paper cutter instead of a laser beam. The knife holder is mounted through a radial bearing on the - positioning mechanism in such a way that the knife tip is eccentric to the bearing axis by a small distance (so-called offset). Therefore, the knife tip, which engages into the sheet paper during cutting, tends to follow the path of the -driven bearing axis by the error that depends on the path tangential and the eccentricity of the knife tip. A tractrix model is applied to describe the kinetic motion of the knife tip and a method is formulated to compensate for the tracing error of the eccentric knife tip by modifying the original cross-section contours of the part for each layer based on the tractrix equation. A study has also been performed regarding the effect of the knife tip geometry on the cutting notch of the sheet paper and on the roughness of the finished part.

关键词: rapid prototyping     laminated object manufacturing     knife-cutting     tracing error    

升沉补偿装置虚拟样机协同设计及仿真分析

吕东,何将三,刘少军,黄锴

《中国工程科学》 2004年 第6卷 第3期   页码 36-40

摘要:

采用参数并行集成化方法设计深海采矿升沉补偿装置的虚拟样机,并进行了虚拟试验仿真研究,探讨协同设计在复杂机电系统中的具体应用,为深海开采系统总体设计提供设计理论参考。

关键词: 升沉补偿     虚拟样机     协同设计     仿真    

Reactive power compensation of an isolated hybrid power system with load interaction using ANFIS tuned

Nitin SAXENA,Ashwani KUMAR

《能源前沿(英文)》 2014年 第8卷 第2期   页码 261-268 doi: 10.1007/s11708-014-0298-6

摘要: This paper presents an adaptive neuro fuzzy interference system (ANFIS) based approach to tune the parameters of the static synchronous compensator (STATCOM) with frequent disturbances in load model and power input of a wind-diesel based isolated hybrid power system (IHPS). In literature, proportional integral (PI) based controller constants are optimized for voltage stability in hybrid systems due to the interaction of load disturbances and input power disturbances. These conventional controlling techniques use the integral square error (ISE) criterion with an open loop load model. An ANFIS tuned constants of a STATCOM controller for controlling the reactive power requirement to stabilize the voltage variation is proposed in the paper. Moreover, the interaction between the load and the isolated power system is developed in terms of closed loop load interaction with the system. Furthermore, a comparison of transient responses of IHPS is also presented when the system has only the STATCOM and the static compensation requirement of the induction generator is fulfilled by the fixed capacitor, dynamic compensation requirement, meanwhile, is fulfilled by STATCOM. The model is tested for a 1% step increase in reactive power load demand at = 0 s and then a sudden change of 3% from the 1% at = 0.01 s for a 1% step increase in power input at variable wind speed model.

关键词: isolated wind-diesel power system     adaptive neuro fuzzy interference system (ANFIS)     integral square error (ISE) criterion     load interaction    

标题 作者 时间 类型 操作

Performance analysis of series/parallel and dual side LCC compensation topologies of inductive power

P. Srinivasa Rao NAYAK, Dharavath KISHAN

期刊论文

Research on the ecological compensation standard of the basin pollution control project based on evolutionary

Dongbin HU, Huiwu LIU, Xiaohong CHEN, Yang CHEN

期刊论文

筑坝河流的生态补偿

董哲仁

期刊论文

Social responsibility in infrastructure mega-projects: A case study of ecological compensation for

Zheming LIU, Liangyan WANG, Zhaohan SHENG, Xinglin GAO

期刊论文

Quantitative standard of eco-compensation for the water source area in the middle route of the South-to-North

Zhanfeng DONG, Jinnan WANG

期刊论文

Determination of the scheme of precision grinding compensation on the radome

GUO Dongming, LIU Minjing, ZHANG Chunbo, SHENG Xianjun, SUN Yuwen

期刊论文

Ecological compensation based on willingness to accept for conservation of drinking water sources

Linyu XU,Bing YU,Yang LI

期刊论文

A combined modulated feedback and temperature compensation approach to improve bias drift of a closed-loop

Ming-jun MA,Zhong-he JIN,Hui-jie ZHU

期刊论文

A pre-compensation method of the systematic contouring error for repetitive command paths

D. L. ZHANG,Y. H. CHEN,Y. P. CHEN

期刊论文

Ecological compensation mechanism for urban green land and its application in Shanghai, China

WANG Yan, DING Xiaowen, QIAN Longxia, WANG Hongrui

期刊论文

三峡库区及其上游水污染防治补偿机制的探讨

何继善,戴若林,王孟钧,张彦春

期刊论文

毫米波调频步进雷达运动补偿方法研究

王桂丽,李兴国

期刊论文

Error compensation for tool-tip trace during cutting of laminated paper for rapid prototyping

Yucheng DING, Changhe LI, Dichen LI, Guoxin YU

期刊论文

升沉补偿装置虚拟样机协同设计及仿真分析

吕东,何将三,刘少军,黄锴

期刊论文

Reactive power compensation of an isolated hybrid power system with load interaction using ANFIS tuned

Nitin SAXENA,Ashwani KUMAR

期刊论文